As you live your life every day, always realize that life exists on many levels. What we see and perceive to be real on an outer physical level is but the outer shadow of a far greater reality at work. This applies to both the outer appearance of good, as well as that which-when carried to an extreme-one perceives to be evil. Both heaven and hell exist in the human psyche. The spiritually aware person is aware of the dualistic warfare taking place within and needs to make a choice. Either the personal ego is in charge, which leans the mind and soul towards the dark side, or the personal ego is set aside in favor of the Light of God's indwelling reality.
To have a mental attitude that works for financial prosperity, we should think of ourselves as also being prosperous in peace, love, wisdom, health, etc. Only then does the mind completely accept the abundance that life has to offer.
Your conscious attitude and the thoughts you think each day have the ability to invoke Mystical Power that can make success and happiness a reality in your life.
Eventually, whether in this physical lifetime or another, we become aware of the various states of our beingness; and through the Grace of God's Presence, we integrate all levels into a harmonious working Wholeness of Beingness.